---
id: CVE-2026-112897
title: >-
  Pillow: TiffDecode returns uninitialized memory as pixels for short JPEG
  strips
summary: >-
  Pillow is a Python imaging library. From 5.3.0 until 13.0.0, Pillow can return
  uninitialized memory as pixels when libtiff performs a short decode of
  JPEG-compressed or Group 4 fax TIFF data. The _decodeStrip and _decodeTile
  buffers can …
severity: high
cvss: 8.7
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-908
vendor: python-pillow
product: Pillow
affected:
  - 'Pillow >= 5.3.0, < 13.0.0'
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T22:00:52.749Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-112897'
references:
  - url: >-
      https://github.com/python-pillow/Pillow/security/advisories/GHSA-q45j-58j2-45rg
    label: >-
      https://github.com/python-pillow/Pillow/security/advisories/GHSA-q45j-58j2-45rg
  - url: >-
      https://github.com/python-pillow/Pillow/commit/1d4773e6cea0c4a2814e6d4cdc099bbcf56da6ce
    label: >-
      https://github.com/python-pillow/Pillow/commit/1d4773e6cea0c4a2814e6d4cdc099bbcf56da6ce
  - url: 'https://github.com/python-pillow/Pillow/releases/tag/13.0.0'
    label: 'https://github.com/python-pillow/Pillow/releases/tag/13.0.0'
tags:
  - cve.org
ingestedAt: '2026-10-19T22:46:42.320Z'
---

## Overview

Pillow is a Python imaging library. From 5.3.0 until 13.0.0, Pillow can return uninitialized memory as pixels when libtiff performs a short decode of JPEG-compressed or Group 4 fax TIFF data. The _decodeStrip and _decodeTile buffers can be larger than the bytes written by libtiff, but Pillow converts the expected rows without clearing the unwritten tail. The tile path is affected from 5.3.0 and the strip path from 6.0.0. An attacker can supply a crafted TIFF to an application that loads and returns or re-encodes its pixels. This can disclose stale heap contents without memory corruption or a process crash. This issue is fixed in version 13.0.0.

## Affected

- `Pillow >= 5.3.0, < 13.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.